Combining color and edge information to find door locations in an image
Carl Wellington, Roger A. Bock, Bruce Maxwell · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 1999
A method for locating the doors in an image is presented. The method integrates an edge map with color information known about the doors to provide better results than methods based purely on color or edges. The Hough transform is used to find lines and then a set of heuristics is used to find possible door regions. The door regions are tested by determining whether the region is the correct color. The combination of color and edge data allowed the system to successfully identify doors within a complex environment at different scales, orientations, lighting conditions and using different cameras.